nutrition and gas exchange in plants- topic 7

Cards (18)

  • waxy cuticle, prevents water loss by evaporation, aquatic plants do not have a waxy cuticle
  • importance of photosynthesis, light energy (sun) chemical energy (glucose)
  • three uses of glucose are sucrose, starch and cellulose
  • nitrates required for amino acids of proteins for healthy plant growth
  • waster products of metabolism are, oxygen released out of the stomata
  • if it gets too cold the rate of photosynthesis will decrease however plants cannot photosynthesise if it gets to hot
  • without enough light a plant cannot photosynthesise very quickly, increasing light intensity will boost rate of photosynthesis
  • even if there is plenty of light a plant cannot photosynthesise if there is insufficient carbon dioxide
  • magnesium required to make chlorophyll, chlorophyll is required for photosynthesis
  • spongy mesophyll not packed tightly together allows the movement of gasses to and from the cells
  • palisade cells top layer, have many chloroplasts to catch sunlight are blocked shape so can pack many
  • photosynthesis equation carbon dioxide+water-glucose+oxygen
  • plants have leaves as leaves are used to take in co2 and capture sunlight which is needed for photosynthesis
  • stomata are pores which allow for gas exchange, to limit water loss the top of the leaf is more exposed to the sun and wind which increases rate of transpiration
  • stomata are open when turgid
  • stomata are closed when flaccid
  • photosynthesis carbon dioxide in, oxygen out
  • respiration oxygen in carbon dioxide out